[SI-LIST] Re: High Speed Routing
- From: agathon <hreidmarkailen@xxxxxxxxx>
- To: scott@xxxxxxxxxxxxx
- Date: Wed, 30 May 2007 12:37:36 -0700
Scott.... you go boyyyy
On 5/30/07, Scott McMorrow <scott@xxxxxxxxxxxxx> wrote:
>
> Pon,
>
> Go out and do your own research before you pose a plethora of questions
> like this. It looks like you are a University student trying to answer
> questions on a take-home test.
>
> Scott
>
> Scott McMorrow
> Teraspeed Consulting Group LLC
> 121 North River Drive
> Narragansett, RI 02882
> (401) 284-1827 Business
> (401) 284-1840 Fax
>
> http://www.teraspeed.com
>
> Teraspeed(r) is the registered service mark of
> Teraspeed Consulting Group LLC
>
>
>
> Pon Ganesh wrote:
> > Expecting your answers for the below.
> > a.. I have two groups of signals Group-A (3GHz differntial pair) and
> Group-B (16bit, 250MHz DDR2 single ended lines). Both A&B can't be routed in
> inner layers. Either one must be routed on Microstrip. Which one u ll route
> in Micro strip (Single ended-250Mhz/diff3Ghz) ?
> > b.. Whats the use of dual stripline, when no.of layers is not a
> issue.,
> > c.. why don't u prefer odd-no of layers ? ( answers other than... PCB
> warpage, Fab feasilbility and Cost)
> > d.. U have 20MHz and 200MHz signal on a same layer. How ll u route .
> Isolation ?
> > e.. How stitching capacitors are useful to minimize in-rush current
> > f.. When ll u use spoke vias. whts the disadvantage of spoke vias
> > g.. Why do we noramlly short isolated Analog and Digital digital GNDs
> on a small area
> > Thanks,
> > Pon Ganesh
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